Vault



May 25, 1937. w. E. wlLKlNsoN VAULT Filed May 29, 1935 15 Sheets-Sheet 2 mit' OJO? INVENTO @E W QT ATTORNEY May 25, 1937.

W. E. WILKINSON VAULT Filed May 29, 1955 15 Sheets-Sheet 3 INVENTOR rp E W ATTORNEY May 25 l937- w. E. wlLKlNsoN 2,081,316

VAULT Fild May 29, 1955 15 Sheets-Sheet 4 ISZ 43H42 @@4- .i @n 6 15S '7 .vENToR i?? d@ io EWI fo @QT 51g ATTORNEY WIN BY May 25%y 1937. w, E wlLKlNsON 2,081,316

VAULT Filed May 29. 1935 l5 Sheets-Sheet 5 ATTORNEY May 25 1937. w. E, WILKINSON 2,081,316

I VAULT y Filed May 29, 1935 l 15 Sheets-Sheet '7 /i\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\Wm 3 m m oryEWfiH-yfoy x @www Mai' 25, 1937. wjE. WILKINSON 2,081,316

VAULT `Filed May 29, 1935 l5 Sheets-Sheet 8 in no? 3fm WHIOTEWHI foy x N @www May 25, 1937. W. E. WILKINSON VAULT Filed May 29, 1935 l5 Sheets-Sheet l0 May 25, 1937. w. E, WILKINSON Zll VAULT Filed May 29, 1935 15 Sheets-Sheet 1l WHMWEWH'IQfOD MMMAMJN' A,

May 25, 1937.

W. E. WILKINSON VAULT Filed May 29, 1935 l5 Sheets-Sheet 14 .3u/Umm I lfOp May 25, 1937. w. E. WILKINSON 2,081,316

VAU1JT Filed May 29, 1955 15 Sheets-Sheet 15 ATTORNEY Patented lVay` 25, 1937 UNHTED STATES PATENT oFFicE VAULT William E. Wilkinson, York Safe and Lock York, Pa., assignor to Company, York, Pa., a

10 Claims.

This invention relates to Vaults, safes and the like and more particularly to closures for vaults or safes, especially closures for large structures and designed to be burglar proof.

An object of the invention is to provide an improved construction of closure adapted to securely seal the vault or safe against violent entry.

Another object of the invention is to provide an eilcient construction adapted eiectively to resist penetration of the closure wall by a flame and to insulate the interior against re.

Another object of the invention is to provide an improved construction for large closures which will be very strong and durable and adapted for convenient transportation'and erection as well as eiicient securing of the parts together, the joints in which construction will be close fitting so as to prevent the entry of explosive liquids and the o bke,

Another object of the invention is to provide an improved closure for vaults and safes which includes in its construction a rotatable closure member having eccentrically formed surfaces adapted to be wedged into engagement with the housing of the structure and simple and efcient mechanism for operating the closure member,

Another object of the invention is to provide an improved safe or vault of the character mentioned, which is simple in construction, and reliable and exact in function under all conditions of service.

The invention also comprises certain new and useful improvements in the construction, arrangement and combination of the several parts of which it is composed, as will be hereinafter more fully described and claimed.

In the accompanying drawings:-

Figure 1 is a front elevation of a portion of a vault having a closure member constructed according to the present invention, the closure member being shown in closed position;

Fig. 2 is a horizontal section taken approximately on the line 2 2 of Fig. 1

Fig. 3 is a view similar to Fig. 2, showing the closure member in open position;

Fig. 4 is a vertical section taken on the line 4-4 of Fig. 2;

Fig. 5 is a Vertical section taken on the line 5 5 of Fig. 2;

Figs. 6 and 7 are horizontal sections taken on the line B-l of Fig. 4, Fig. 6 showing the construction of the parts in the front of the base of the device and Fig. 'l showing the construction of the parts in the rear of the base of the device;

Fig. 8 is a plan of the top of the side frame pieces at the rear of the device showing the manner of mounting the lintel block over the rear portion of the door opening;

Fig. 9 is a plan of the top of the side frame 5 pieces at the front of the device showing the manner of mounting the lintel block over the front portion of the door opening;

Fig. l0 is a front elevation of the structure shown in Fig. 9;

Fig. ll is an enlarged section of the structure shown in the lower left hand corner of Fig. e;

Fig. l2 is an enlarged section of one of the seals between the closure member and a side frame piece of the door housing at the front of the device;

Fig. 13 is an enlarged vertical section of the upper closure member journal and its bearing;

Fig. 14 is a plan of the structure shown in Fig. 13, the top cover plate being omitted;

Fig. 15 is an enlarged vertical section of the lower closure member journal and its bearing;

Fig. 16 is a horizontal section taken on the line lB-i of Fig. l5;

Fig. 17 is a vertical longitudinal section of a portion of the operating mechanism for the closure member;

Fig. 18 is a horizontal section of the hand wheel and the mechanism associated therewith `shown at the right hand in Fig. 17;

Fig. 19 is a front elevation, with parts broken away to show the underlying structure, of the hand wheel shown at the right in Fig. 17

Fig. 20 is an elevation with parts in section and other parts broken away of the rear portion of the operating mechanism for the closure member;

Fig. 2l is a vertical longitudinal section of a portion of the locking mechanism for the closure member;

Fig. 22 is a front elevation of the hand Wheel and associated parts of the loclng mechanism;

Fig. 23 is a horizontal section taken on the line 23-23 of Fig. 22;

Fig. 24 is an enlarged horizontal section of one of the locking bolts at the rear of the closure member;

Fig. 25 is an elevation, with parts broken away, of the locking bolts and their associated parts, looking from the rear of the closure member; and

Fig. 26 is a detail section Showing one of the stops for the closure member.

Referring to the drawings, the invention is particularly applicable in a vault or safe, the 55 walls of which, indicated at il, may be of any well known construction, being formed for example, as is the well known practice, of well armored masonry, cement or metal.

1n order that access may be had to the interior of the vault, a closure member, constructed according to the present invention, is mounted in the wall ll.

The closure member comp-rises a stationary frame constructed in the manner to be hereinafter described and having formed therein an opening, the outer and inner ends of which are indicated at 6?; and i3, respectively, (Figs. 2, 3 and 4) and this opening is provided with a revoluble closure member or door ld, a particular form of which will be hereinafter described.

The stationary housing or frame for the door i4 is composed of heavy cast steel sections united together in a manner to be described to provide a strong fluid tight and burglar prooi structure.

En constructing the vault and its door, it is customary to provide a sturdy'foundation for the closure member, which foundation preferablyis constructed of reinforced concrete masonry of suitable type for supporting the door structure.

As shown in Fig. 4, a foundation plate i5 lies on the masonry of the vault at the bottom of the opening. rThis foundation plate carries the main base frame piece i@ of the door, both base pieces being substantially rectangular in form.

The base frame piece iii is in the form of a single casting and around its periphery is formed with an upstanding flange il, the purpose of which will be hereinafter described (see Figs. 4, 5, 6 and 7).

Supported by the base frame piece l5 and extending upwardly therefrom a suitable distance, are side frame pieces is, 2B, 2i and 22 (see Figs. 2, 3, 5, '7, 8, 9 and l0). The side frame pieces extend Valong both sides of the opening and support a top frame piece 23.

Beneath the opening at the front of the door and spanning the space between side frame pieces i5 and 2l, is a block 2d, (Figs. 4, 6 and 11) Spanning the space between the side frame pieces 20 and 22 at the lower rear portion of the opening, are blocks 25 and 26, the block 26 being carried by and also being mounted in the block 25 in the manner to be hereinafter described (see Figs. 4 and 7).

Connecting the top of the side frame pieces i9 and 2i at the iront of the opening, is a block or lintel 27 (see Figs. 4, 9 and l0) and connecting the top of the side frame pieces 2i) and EZ at the rearroic the opening, is a block or lintel 28.

All of the parts of the door frame are inter locked and permanently secured together Yin a novel manner.

As shown in Figs. 4, 5, 6 and 7, the base frame piece le maybe formed of hard material, such as caststeel. The bottom of said base is formed with a plurality of radially disposed ribs 3d, and the spaces between said ribs may be lled with a heat resistant material 3i.

With a view to providing means for permanently assembling the several parts of the housing and for interlocking them tightly together, the base frame piece i6 is iormed around its periphery and at a point inwardly a suitable distance from the upstanding iiange il, with a groove 32 of a size to accommodate a tongue 33 depending from the bottom of each oi the side frame pieces i9, 2Q, 2i and 22, and the blocks 2li and 25. Figs. 4 and l1 illustrate the manner in which the tongue and groove connection is formed between the blocks 24 and 25 and the base frame piece i6, and it will be understood that a similar form of construction is used in connecting the lower edges or bottoms of the side frame pieces with the base frame piece.

The groove 3.2 is formed with a recessed portion 3d, as shown best in Fig. 1l, and this recessed portion is filled with a suitable metallic paste-like substance, 35 which, upon hardening, seals the bottom peripheral joint between the door frame pieces above described.

Also, as shown in Figs. 4 and 5, the tops of the door frame sections are similarly interlocked and sealed. A groove 3Q is formed in the top :trarne piece 23 adjacent the periphery thereof, and an upstanding tongue 3l is formed on the upper surfaces of the side frame pieces i3, 2d, 2| and 22, and the front and rear lintels or blocks 2l and 2t, respectively, (see also Fig. l0), said tongue tting into said groove in the manner heretofore described and illustrated in Fig. ll, and a seal 38 also being provided, similar to the filler 35 heretofore described.

Referring now to Figs. 4 and 9, the outer face of the lintel block 2l is notched, as indicated at 5l (Fig. 4) for the reception of a iiange 58 depending from the periphery of the top frame piece 2S. Screws 59 are employed for fastening the lintel block 2 to the top frame piece 23.

In order to prevent undue displacement of the lintel 2 from the side frame pieces i9 and 2i, the opposite ends or" said lintel are formed with dove tail slots ii, and correspondingly formed slots lili are provided in the adjoining edges oi the side frame pieces i9 and 2i, respectively. Dove tail keys EQ2 are mounted in said slots 60 and it, as shown in Figs. 9 and l0.

Likewise, the cuter face of the lintel block 28 is notched, as indicated at EEES (Figs. 4 and 8) for the reception of a ange m4 depending from the periphery of the top frame piece 23. Screws E are employed for fastening the lintel block 28 to the top frame piece 23.

Also, in order to prevent undue displacement of the lintel 28 relative to the side frame pieces 20 and 22, the opposite ends of said lintel are formed with vertical dove tail slots iii, and correspondingly formed slots i'i are provided in the adjoining edges of the side frame piecesil and 22, respectively. Dove tail keys m8 are mounted in said slots iand lill', as shown in Fig. 8.

Referring now to Figs. 2, 3, 6 and '7, the adjoining edges of the side frame pieces are also interlocked and sealed.

Side frame piece i9 is formed along the edge adjacent side frame piece 2@ with a relatively broad groove 39, which terminates at the inner wall of said side frame piece in a comparatively narrow, but deeper groove d.

The surface of side frame piece 2t which abuts side frame piece i9 is formed with a relatively broad tongue ii which is mounted in groove 39 and a comparatively narrow tongue l2 which is disposed in groove lit.

The construction of the tongue di and groove 219 is such that when the side frame pieces are assembled there will be an elongated space therebetween, which space is lled witha suitable filler i3 which will render the joint fluid tight.

Also, side frame piece 22 is formed along the edge adjacent side frame piece 2i, with a relatively broad groove ad, which terminates at the inner wallof said side frame piece in a comparativelynarrow, but deeper groove 35.

Cil

The surface of side frame piece 2l which abuts side frame piece 22 is formed with a relatively broad tongue 45 which is mounted in groove 114 and a comparatively narrow tongue 41 which is disposed in groove 45.

The construction of the tongue 46 and groove 44 is such that when the side frame pieces 2| and 22 are assembled there will be an elongated space therebetween, which space is filled with a suitable ller lli? to render the joint uid tight.

Furthermore, in order to rigidly interlock the side frame pieces together, the outer edge portion of side frame piece 2@ at a point adjacent the interlocked joint above described, is formed with a notch or cut away portion 49 for the reception of a flange 5d with which side frame piece l is provided.

Likewise, side frame piece 2l is formed with a cut away portion or notch 5l, similar to the notch 49, and side frame piece 22 is formed with a flange 52 which is mounted in notch 5l The manner or" constructing the side frame pieces provides means whereby these sections of the door frame can be readily shifted while being assembled in the vault and when properly positioned will be iirmly interlocked together.

After being properly assembled, the sections of the door frame are further secured together by screws 53, as indicated in several gures of the drawings.

When the parts of the device are being assembled, the side frame pieces are lowered in position on to the base frame piece le and after the door id has been assembled within the side frame pieces, the top frame piece 23 is lowered in position on the side framey pieces.

When the parts oi the door frame are assembled, a substantially cylindrical opening will be formed, as shown in 2, for the door ill.

The side frame pieces i9, 2G, 2l and 22 of the door frame are preferably formed of composite material. The walls of said frame pieces are formed of hard material, such as cast steel, and these walls are of such thickness as to provide a strong, rigid structure. Also cast integrally with the walls of the side frame pieces, are pins 54 which extend inwardly from said walls a suitable distance and ternn'nate in enlarged portions or knobs 55, (see Figs. 2 and 3).

As will be understood, the cast steel walls of the side frame pieces, thus constitute tubes or jackets, and these are filled with heat resistant material 55 which is reinforced by the pins 5d. The material 5S within the side frame pieces i9, 2l), 2l and 22 is adapted to oier a great resistance to heat or to a flame. In constructions` in which the flame proof and heat resistant properties of the door are of particular importance, it is desirable to form the side frame pieces in the manner illustrated, with the body of heat resistant material much thicker than the Steel walls of the tubular jacket which surround it. Any type of heat resistant material may be used, such as a mixture of suitable metals. Such material is poured into the tubular jackets of the side frame pieces in a molten state and permitted to slowly harden. When an attempt is made to penetrate a door of this type by means of a blow torch, the heat will be carried E too rapidly to enable the torch to be eectively used in sur"- ciently melting the mass or" material quickly to form an opening of the necessary size.

The particular ype. of door illustrated includes: a pair of spaced front and rear sections l and $2 which, as shown, consist of tubes or jackets of hard material, such as steel, lled with heat esistant material S3 and reinforced by pins 64 which extend inwardly from the side walls thereof a suitable distance and terminate in enlarged portions or knobs G5.

The shape of the sections Ei and S2 may be substantially that of sections of a cyl'mder 'from which the central portion has been cut away along the lines of two planes extending throughout the length of the cylinder. There is thus iormed a door comprising two members which may be rotated on a single axis and which have formed therebetween a large air space or passageway 56 which serves when the door is in open position, as shown in Fig. 3, to connect the ends l2 and i3 of the opening through the housing and which serves when the door is closed, as shown in Fig. 2, to increase the heat insulating properties of the door.

In the construction shown, the axis: or" the door is vertically disposed. The sections 5i and 52 of the door are connected by means of a circular cap plate 5l' and a circular base plate 68.

As shown in Fig. 4, at diametrically opposite sides, the cap plate l is undercut, as at G9 and l, to form two shoulders il and E2 against which respectively abut the upper inner flat faces ci the two door sections el and t2.

Also, at diametrically opposite sides, the base plate 6B is formed with upstanding ribs i3 and le, against which abut the lower inner notched portio-ns 'l5 and lo? of the two door sections SI and 52, respectively.

Along the top of the upper outer edge portion or" the door section Si, there is formed an upstanding rib or tongue l? which is disposed in a correspondingly formed groove 78 constructed on the underside of the iront outer portion of the cap plate 6l.

Also, along the top of the upper outer edge portion of the door section 62 (there is formed an upstanding rib or tongue 'It which is disposed in a correspondingly formed groove Se constructed on the underside oi the rear outer portion of the cap plate 6l.

The outer lower edge portion of the iront door section Si extends downwardly in the form of a flange 8i which terminates a point below the inner lower edge portion of said section. The iiange 8l is further formed with a depending rib or tongue 32 which is disposed in a correspondingly formed groove 33 in the base plate adjacent the iront edge thereof, as shown best in Fig. ll.

. The groove GS is formed with a recessed., portion 8d and this recessed portion is filled with a suitable metallic paste-like substance S5 which, upon hardening, seals the joint between the iront door section 5i and the base plate S3.

Similarly, the outer lower edge portion ci the rear door section S2 extends doeuiwardiy in the form of a iiange S5 which terminates at a point below the inner lower edge portion of said section. The fiange 85 is further formed t ith a depending rib or tongue Si' which is disposed in a c espendingly formed groove 33 constructed the base plate 58 adjacent the rear edge thereof. Furthermore, as shown in Fig. 4 the joint between the door section 52 and the base plate 58 is formed with a ller 85 similar to the filler 85 shown in the enlarged View, Fig. 11.

In order to assemble the several sections of the door, the base plate is first positioned, as shown in Fig. 3, that is, the door open position. The two sections 6I and 62 are then lowered into place,

with the tongues 82 and 8l, respectively disposed in the grooves 33 and 22 and the upstanding ribs 3and lli disposed in the notched portions l5 and i5 of the door sections Si and 62 respectively. With the parts thus positioned the inner face of the flange 8i abuts a shoulder 8s on the base plate 68, and the inner iacerof the flange 8E abuts a shoulder 9B on said base plate.

Screws 9i and S2 are used for securing the lower outer portions of the door sections 5| and 52 to the base plate b2, as shown in Fig. 4. The screws Si can readily applied from the exterior of the door, and the screws 92 can be applied from the interior of the door.

After the two door sections Si and 52 have been positioned on the base plate 68, the cap plate 61 can be lowered into position on top of said door sections. In such position the parts will be disposed as shown in the upper part of Fig. 4, with the tongues l? and le, disposed in the grooves 18 and 8i), respectively.

The cap plate El may now be securely fastened to the door sections @l and 62, by means of screws 93, as shown in Fig. 4.

At diametrically opposite sides, the periphery of the cap plate 67 is formed with dove tail grooves 92 and 95.

The inner edge portion of the upper front block or lintel 2l is formed with a dove tail rib 9S which is adapted to engage in the groove 911.

Likewise the inner edge portion of the upper rear block or lintel 28 is formed with a` dove tail rib 9'l=wlnch is adapted to engage in the groove 95.

The front portion of the base plate 38 is formed with a dove tail groove i il in which is mounted a correspondingly shaped rib H2 formed on the inner portion of the lower front block 22.

In Fig. 11, there is shown an enlarged View of the dove tail tongue and groove connection at the lower front end of the door. It will be understood that the other dove tail joints at the top of the door structure heretofore described are similarly formed.

As shown clearly in Fig. ll, a slight clearance is provided between the stationary dovetail tongue and the rotatable dovetail groove of the door, so that when the door is rotated the parts will not bind. By utilizing dove tail joints it will be understood that lateral shifting movementsl of the` parts relatively to each other will be prevented since the inclined surfaces of the tongues will come into engagement with the inclined surfaces of the grooves should any perceptible lateral movement take place.

However, in order to seal the joints between the blocks 22 and 2l and the door, suitable packing strips H3 and lll are mounted respectively 1n said blocks (see Figs. e and 11).

As shown in Figs. 4, 6 and 11, there are blocks M5 mounted on the base frame piece lil to the rear of the block 25.

The lower rear block 25 is substantially L- shaped in cross section, as shown in Fig. 4. The block 25 is keyed to the base frame piece i5 by means of a tongue Hl which is disposed in acorrespondingly formed groove HB in the base frame piece |65. The construction of the tongue H1 and groove il@ is similar to that shown underneath the block 26 in the enlarged section (Fig. 1l) and a similar filler is employed to seal.

the joint therebetween as has been heretofore described.

As shown best in Fig. 7, block 26 ts into block 25 in order to complete the contour of the rear analisis' lower portion of the-housing'. It is necessary to make these llers'in two parts so that the screws 9| can be mounted in the lower rear portion of the door. When the parts are being assembled the block 26 is not positioned until after the screws 9| have been applied. After block 26 has been positioned in block 25, it is firmly secured thereto by screws I9, `(see Figs. 4 and '7).

In Figs. 2 and 3, the center of rotation of the door |4-is indicated at |23. The numeral |24 indicates the center of curvature of the arcuate face of the front door section 6 l, and the numeral |25 indicates the center of curvature of the arcuate face of the rear door section 62. It will be understood that the radius of the outer curved or outer walls of the two door sections 6| and S2 is the same, but when the two door sections have been assembled in position, the center point |24 is on one sideof the axial center of the door and the center point |25 is on the opposite side of the center of the door.

The vertical arcuate inner walls of the rear frame pieces 2| and 22 are formed with vertically disposed arcuate bearing surfaces |255, and thevertical arcuate inner walls of the front side frame pieces I9 and 2| are formed with vertically disposed arcuate bearing surfaces |2I. The radius of curvature of the bearing surfaces 2| coincides with the center of curvature of the outer door section Ei i, namely, the point 24 above referred to, and the radius of curvature of the bearing surfaces E25 coincides with the center of curvature of the inn-er door Sectio-n 62, namely, the point i25 above referred to. As has been described, the top and bottom portions 6I and 68 comprise circular plates between which are supported the front and rear door sections 6| and 62, respectively. It has also been described that the outer arcuate surfaces of the door sections 5| and 62 are formed segments of a true circle. However, since the center of curvature of said sections 5| and 62 are offset with respect to the axial center of the door, said door sections are eccentrically mounted on the top and bottom plates 6'! and @8. The arcuate bearing surfaces |2| and |26 of the housing are also formed segments of a true circle, however, since the center of curvature of said bearing surfaces are offset with respect to the axial center of the said bearing surfaces are eccentrically disposed with respect to the rotating axis of the door. Thus, when the door is rotated from closed to open position, the door sections 6| and 52 will be moved away from engagement with the bearing surfaces |2i and 26, respectively of the side frame pieces iii, 2B, 2| and 22, and vice versa, when the doo-r is rotated from open to closed position, said door sections will be gradually moved into engagement with the bearing surfaces |2| and |26;

rlhe parts are so constructed that the rear door section 62 will snugly nt the bearing surfaces |28 of the rear side frame pieces 29 and 22; Figs. 2 and 3. However, in order to provide a tight seal between the front door section 6| and the bearing surfaces l2| of side frame pieces I9 and 2|, at a point adjacent the front opening I2 of the vault door, sealing strips |22 are provided, as shown best in Fig. 12. This construction is such that the entire periphery of the front door opening is made fluid tight by the packing strips ||3 and H4 and the sealing strips E22.

For the purpose of pivotally supporting the door lli in its frame, the cap plate 6l carries an a lower journal i32.

operate to center the door in a manner to be hereinafter more fully described.

As shown best in Fig. 13, the upper journal 31! may comprise a cylindrical body having its upper portion threaded as indicated at iBS and its lower portion formed with threads 34.

The threaded portion iIi/l of the journal i3! is adapted mounted in a member 35. The member circular in form and its threaded periphery mounted in a correspondingly formed threaded opening 136 formed in the cap plate e'l'of the door.

IThe journal li is formed, directly above the threaded portion i3d thereof, with a ange 3l which bears against the upper face of the member E35.

The top frame piece 23 is formed with a circular upstanding harige ESB which surrounds threaded opening l@ formed centrally in said top frame piece.

Moimted in the opening i3d and supported by the threads thereof, is a member lilo which supports upper and lower ball bearings lill and M2, respectively.

The upper bearing ill! includes a pair of rings S43 and i413. The ring MS is mounted in a notch or groove M5 formed in the bearing supporting member Mil, and said ring is formed with an eccentric opening ll therethrough.

The ring ille has a main body portion which snugly ts the opening M5 of ring i113, and said ring M4 is formed with an outwardly extending iiange lill which rests upon the top of the ring 43, Ring llll is mounted in ring lfl so that one ring can be turned relatively to thD other. For this purpose the rings U13 and lflfl are formed with a plurality of openings H8 and i119, respectively, which openings are adapted to be alined so as to receive pins by means of which said rings are moved in the bearing supporting member Hill.

Also, the upper surface of the ring M3 is formed, as shown in Fig. 14, with serrations 15G adapted to receive a suitable tool by means of which said ring can be rotated.

After the parts of the bearing have been properly positioned, the ring M3 is locked in position by means of set screw 15|, shown in Figs. 13 and 14.

Mounted on the journal l3l and disposed between the bearings lill and i132 is a collar 52 which is adapted to maintain said bearings in correctly spaced position.

The upper end of the collar l52 is reduced somewhat in diameter as indicated at 53, so as to support the bearing lll. Mounted on the upper threaded portion i315 of the journal 3l is a nut iSd which bears against the top of the bearing lill in the manner shown in Fig. 13.

As shown in Fig. lll, the nut |54 is round or circular in plan and in order that said nut may be rotated it is provided with a plurality of openings E55 for the reception of a Spanner wrench or other suitable tool.

As shown in Fig. 13 the bearing |4I includes a plurality of balls which are carried in a ring 155 mounted in the ring la@ heretofore described. The lower flanged end lE of the nut 54 also engages the balls of the bearing ll to retain the same in position.

The lower bearing 42 is adapted to take the end thrusts of the door and for this purpose this bearing includes a plurality of rings l5?, leg and l59. Interposed between the rings l'l and l is a series of balls. The lower edge portion of ring 158 is bevelled, as shown in Fig. 13 and this inclined surface rests upon a correspondingly formed upper surface of the ring l59. The ring i5? is disposed in a suitable notch ll'il formed in the lower portion of the collar i552, while the ring l 59 is supported on an inwardly extending flange itil formed on the member llll.

Referring to Figs. 4i, 5, 15, and 16, the base frame piece l5 is formed with a central upstanding boss itl which constitutes the bearing support for the lower journal 32 of the door.

r1'he base plate Gil of the door is formed with a central threaded opening |62 in which is mounted a circular member E63.

Formed centrally through the member U53 is an opening ld in which is mounted the journal 32, and also formed in the member IES are other openings l which latter openings are closed at the top by plugs 165.

The journal 32 is preferably made with three diameters, a lower portion l'l, an intermediate portion 5&8 which is slightly larger in diameter than the lower portion ll', and an upper portion 59, which is slightly larger in diameter than the intermediate portion IBS.

Likewise, the opening lli@ in the member lSB is formed with two diameters, a lower portion ll corresponding in diameter to the size of the intermediate portion lS of the journal l32, and an upper portion ill corresponding in diameter to the upper portion lQ of said journal. As shown in Fig. 15, the lower end iii? of the journal projects below the member l 53.

The journal i152 is supported by upper and lower ball bearings l'lS and llll which are mounted in the boss itl. These bearings are similar in construction to the bearings lill and lll? heretofore described, and the openings 55 are provided in the member 63 so that access may be had to the upper bearing 173 for adjusting the encentric rings thereof in the manner pointed vout before in the description of the bearing Ml. Therefore, the description given above covering the detail construction of the upper bearings also applies to the lower bearings, it being understood that the lower end l'l of the journal lSZ is supported by the collar l52 of the lower bearings.

The purpose of providing the eccentric rings M3 and i134 of the bearings for the journals lSl and l32 is to permit shifting of the door i4 within the housing during the construction of the device, so that said door will rotate properly so as to cause the front door sections 5l to tightly fit the seals in the bearings 26. The rotary movement of the door has been described and in order to obtain such rotation of the door, it is necessary to provide means for properly positioning and mounting the door in the housing, with respect to the inner walls of the side frame pieces i9, 2&3, 2l and 22. By utilizing adjustable bearings of type described above, it will be understood that the door can readily be correctly positioned, and when so positioned will remain in such position indeinitely, due to the provisions of locking the adjustable eccentric rings M3 and ldd.

In case the door ld is locked, by removing the upper bearing assembly, access may be had to the interior of the door for the purpose of removing the lower bearing assembly. In this way the low er bearing can be repaired or replaced.

The door is adapted to be rotated from closed to open position and vice versa, through an angle oi approximately and suitable manually operable mechanism is provided for rotating the 

